Navigating the system is like "playing a video game that no one can master," Costner said. And many government agencies and foreign and U.S. oil companies were unresponsive even after seeing the oil-water separator years ago.

Costner said the device had been sitting at a Nevada facility for 10 years until BP Chief Operating Officer Doug Suttles recently called him.

"He was excited," Costner said. "He told me that the machine worked. He told me that it was working against the dispersants, that it was handling the variations of oil mixtures and thickness present in the Gulf."

Costner said other small businesses like his have ideas that could be used in the oil spill relief effort.

"If we can find oil thousands of feet in the ground at depths that boggle the mind," Costner said, "then surly we have the technology to clean up our own mess."